Tool



Patented May 10, 1932 UNITED STATES PATENT oFFIcE* ALWIN G. STEINMAYER,or MILWAUKEE, wrsconsrmnssrcnon, BY Masam-.L issrerr-l MENTS, TO LINEMATERIAL COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, COB- fr" PORATION OFDELAWARE TOOL Application filed October 26, 1928. Serial No. 315,284.A

This invention relates to certain newl and useful improvements inportable tapering tools, and refers more particularly to a tool adaptedto taper the ends of conduits used in connection with undergroundelectric systems at the time of installation.

' As is well known, conduits of this nature are supplied in sections offixed lengths which very often must be cut to accommodate particularinstallations, and therefore, it isdesirable to provide an improvedmeans for readily tapering the freshly cut ends of a conduit at the timeof installation to facilitate its assembly with the usual couplingmembers.

A tool for this purpose is illustrated in a copending application ofWilliam Beauregard, Serial No. 319,601 filed November 15, 1928, andwhile it functions satisfactorily, it has several disadvantages,principal of which is the fact that, due to its having but a singlecutting edge, chattering can not be eliminated and also it is extremelydiflicult to hold the conduit against rotation. Therefore, thisinvention has as one of its objects to improve the construction oftapering tools of the character described, and to provide a plurality ofcutters adapted to be rotated about the end of a conduit.

Another object of this invention resides in the provision of a to-ol ofthe character described in which means are provided for positivelyguiding the conduit between a plurality of rotating cutting members.

And a further object of this invention resides in the provision of meansfor automatically feeding the conduit between the cutting members.

And a still further object of this invention resides in the provision ofa conduit tapering tool which is readily portable and in which the endsof conduits may be quickly and eiciently tapered.

With the above and other objects in view which will appear as thedescription proceeds, my invention resides in the novel construction,combination and arrangement of vparts substantially as hereinafterdescribed and more particularly defined by the appended claims, it beingunderstood that such changes in 4,the precise embodiment ofthehereindisclosed invention may be made as come within the scope of theclaims.

In the 4accompanying drawings, I have illustrated one complete exampleof the physical embodiment of my invention constructed according tothebest mode "I havey so far devisedfor thepractical application of theprinciples, and in which z, y

Figure 1 is a view, partly `in section and partly in elevation,illustrating my improved tapering tool with a conduit in position tohave its end tapered; Figure 2 is a view similar to Figure 1illustrating the rotating member in elevation and showing the manner ofautomatically feeding the conduit to the cutters, and j Figure 3 is across-sectional view taken thr-ough Figure 1 on the plane of the line 33 accompanying drawings, in which like numerals designate like partsthroughout the several views, 5 represents a mounting member having-abase 6 which kmay bev provided with any suitable means for attachment toa supporter which may be enlarged at its bottom to form a groundengaging surface. The mounting member 5 is substantially cup-shape andhas an internal ring. gear 7V on its outer periphery with which pinions8 of a pair of cylindrical cutter members 9 mesh.

The cutter members 9 are rotatably carried by a spindle member 10 havingan enlarged medial portion 11, and a bearing shaft 12, the medialportion 11 being recessed, as at 11', to receive the cutters. The axestof the cutter members are disposed at an angle to provide'the desiredtaper and the cutter members and freely rotatably mounted in the recess11 by screws 13which have their inner ends threaded in apertures 14 inthe enlarged portion 11 andare rotatedby their pinions 8 in a planetaryfashion, upon the rotation ofthe spindle 10 by a handle 15 fixed'totheouter end of the Y Automatic feeding of a conduit to the cutters 9 isaccomplishedby a sleeve 19 threaded on the rotating spindle 10 andprovided with thumb screws or other means 2O by which it 6 may beclamped to the conduit. Arms 2l are extended from the sleeve 19 atdiametrically opposite points and provide means for readily holding thesleeve and, consequently, the conduit against rotation as the spindle lis rotated by its handle or other means 15, ro-

tation of the spindle 10 threading the same into the sleeve 19 drawingit towards the cutter members and thus evenly feeding the conduit intoengagement therewith. From the foregoing description, taken inconnection with the accompanying drawings, it will be readily apparentto those skilled in the art to which an invention of the characterdescribed appertains, Ythat a 20 novel and improved device isprovidedfor .ta-

pering the ends of conduits which is readily portable and by which theendsof conduits may be tapered in the field at the time ofinstallationin an'eicient .and simple manner and in'which automatic means areprovided for evenly feeding the conduit into engagement with the cuttingmembers.

What I claim as my invention is:

1. A portable toolfor tapering the ends of conduit members .at the timeof installation, comprising a supporting member, a spindlerotatablymounted in the supporting member, cutting Vmembers carried bythe spindle, an exteriorly threaded projection 35 formed on the spindleproviding a guiderfor receiving the end of the conduit member to `betapered, a sleeve threaded on said exten sion, means for clamping theconduit in the sleeve member, and means whereby the sleeve member ma berestrained against rotation as the spin le is rotated to draw the sleeveand consequently the conduit toward the cutting members. Y Y

2. A tool for tapering the ends of conduit members, comprising asupport, aspi-ndle rotatable therein, revoluble cutters carried by thespindle, means for drivin-g the lcutters upon'rotation of the spindle,atubular extension on the spindle for receiving and guiding the endportion of a conduit memberitobe tapered,'a sleeve securable on theconduit member, means carried 'by the sleeve to facilitate holding theconduit member against' rotation during operation of the tool, and athreaded connection between the sleeve and the tubular spindleextensionwhereby the conduit member is evenly fed tothe cutters as the :spindleis rotated.

In testimony whereof I have hereunto affixed my signature.

ALWIN G. STEINMAYER.

